Consolidated Condensed Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock at $1 par value	[1]	Capital in excess of par value	Reinvested earnings	Accumulated other comprehensive income (loss)	Treasury stock (at cost)
Balance at beginning of period at Dec. 31, 2022	$ 442,422	$ 37,221		$ 53,282	$ 395,155	$ (5,983)	$ (37,253)
Net earnings	19,415				19,415
Pension and postretirement benefits (net of $10 tax effect)	(33)					(33)
Foreign currency translation	1,758					1,758
Cash dividends	(6,591)				(6,591)
Stock options exercised	58			50			8
Stock-based compensation	1,006			1,006
Issuance of treasury stock	2			(93)			95
Balance at end of period at Mar. 31, 2023	458,037	37,221		54,245	407,979	(4,258)	(37,150)
Balance at beginning of period at Dec. 31, 2023	516,482	37,221		59,185	458,719	(1,646)	(36,997)
Net earnings	29,131				29,131
Pension and postretirement benefits (net of $10 tax effect)	(32)					(32)
Foreign currency translation	(3,590)					(3,590)
Cash dividends	(7,925)				(7,925)
Stock options exercised	230			196			34
Stock-based compensation	1,271			1,271
Issuance of treasury stock				(184)			184
Balance at end of period at Mar. 31, 2024	$ 535,567	$ 37,221		$ 60,468	$ 479,925	$ (5,268)	$ (36,779)

[1] Each common share of stock equals $1 par value; therefore, the number of common shares is the same as the dollar value.